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entropydave · 6 April 2008, 09:17 PM

OK, so recently we've all been looking at the 5 day time trial. I got a problem - which one of the reference clocks is correct?!

I have used the
1) The Greenwich site
2) Accurist123
3) The reference site suggested in the time trial
4) The speaking clock on the phone
5) A separate application on my PC that logs onto an (unspecified) atomic clock
6) And my "radio linked to Rugby atomic clock" alarm clock

In other words 6 different sources and they all vary by at least +/-1 second.

One of these has to correct! But which? It's obviously not that important -I do not need to do ANYTHING to the absolute second, but it would be nice to know which is correct.
IMHO I suspect my alarm clock is the most accurate as it takes the source directly via a radio signal so no internet lag due to switching thru servers and so on... or have I got to buy myself a caesium atomic clock and have that pulsing away in my apartment and have it radio linked to 6 other similar clocks thoughout the world?!

mickeydainish · 6 April 2008, 09:51 PM

..interesting... I would like to know too... I will be needing it soon?!?! :-)

mldaytona · 7 April 2008, 02:09 AM

my goodness...

mdx77 · 7 April 2008, 02:15 AM

Hard to say for sure, but I know a few of those sites have a disclaimer that says...."to be accurate to within +/-1 second"

padi56 · 7 April 2008, 02:15 AM

When checking any watch for accuracy you must check with the same original time check source start to finish.
Whether its computer phone or even your own quartz watch.

HYDROMAROC · 7 April 2008, 03:35 AM

I see you live in the UK. What I use is, time.gov Obviously the "hour" will be off but the minute and seconds would be the same for you. I hope I explained that right...?? The site is ran by the U.S. navy and is accurate to 0.2 of a second.

Trurolexer · 7 April 2008, 04:10 AM

Quote:

Originally Posted by mldaytona

my goodness...

X2!!!

dkpw · 7 April 2008, 05:29 AM

Of the ones you mentioned, telephony based time services should be considered more accurate than internet based, due to there being less lag. Another good source is BBC radio but make sure you use analogue not digital, as digital can be up to two seconds behind.

6 April 2008, 09:17 PM	#1
entropydave "TRF" Member Join Date: Nov 2007 Real Name: Dave Location: Huntington, IN Posts: 680	All a bit confusing! OK, so recently we've all been looking at the 5 day time trial. I got a problem - which one of the reference clocks is correct?! I have used the 1) The Greenwich site 2) Accurist123 3) The reference site suggested in the time trial 4) The speaking clock on the phone 5) A separate application on my PC that logs onto an (unspecified) atomic clock 6) And my "radio linked to Rugby atomic clock" alarm clock In other words 6 different sources and they all vary by at least +/-1 second. One of these has to correct! But which? It's obviously not that important -I do not need to do ANYTHING to the absolute second, but it would be nice to know which is correct. IMHO I suspect my alarm clock is the most accurate as it takes the source directly via a radio signal so no internet lag due to switching thru servers and so on... or have I got to buy myself a caesium atomic clock and have that pulsing away in my apartment and have it radio linked to 6 other similar clocks thoughout the world?!

7 April 2008, 02:15 AM	#4
mdx77 "TRF" Member Join Date: Jan 2008 Real Name: Kurt Location: Philly Burbs!! Posts: 3,296	Hard to say for sure, but I know a few of those sites have a disclaimer that says...."to be accurate to within +/-1 second" __________________ “This is your last chance. After this, there is no turning back. You take the BLUE pill - the story ends; you wake up in your bed and believe whatever you want to believe. You take the RED pill - you stay in Wonderland, and I show you how deep the rabbit hole goes.” Rolex Submariner 116610LV Hulk \| Rolex GMT 16710 Pepsi \| Omega Speedmaster “Speedy Tuesday” \| Tudor Black Bay 79220R “ETA Rose” \| Tudor Pelagos Blue Dial \| Rolex Submariner Yellow Gold 116618LB \| Rolex Milgauss “Z-Blue” 116400GV

7 April 2008, 02:15 AM	#5
padi56 "TRF" Life Patron Join Date: Jun 2005 Real Name: Peter Location: Llanfairpwllgwyng Watch: ing you. Posts: 53,062	When checking any watch for accuracy you must check with the same original time check source start to finish. Whether its computer phone or even your own quartz watch. __________________ ICom Pro3 All posts are my own opinion and my opinion only. "The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever." Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again. www.mc0yad.club Second in command CEO and left handed watch winder

7 April 2008, 05:29 AM	#8
dkpw "TRF" Member Join Date: Dec 2007 Real Name: David Location: Scotland Watch: 16610 & 214270 Posts: 1,294	Of the ones you mentioned, telephony based time services should be considered more accurate than internet based, due to there being less lag. Another good source is BBC radio but make sure you use analogue not digital, as digital can be up to two seconds behind. __________________ Sub 16610, Explorer 214270, Ω Speedy Pro & many others. David

6 April 2008, 09:51 PM	#2
mickeydainish Banned Join Date: Mar 2008 Real Name: Michael Location: LaLa Land Watch: Sub Date 16610 Posts: 1,757	..interesting... I would like to know too... I will be needing it soon?!?! :-)

7 April 2008, 02:09 AM	#3
mldaytona "TRF" Member Join Date: Feb 2008 Real Name: Michael Location: USA Watch: me go all out Posts: 1,183	my goodness...

7 April 2008, 03:35 AM	#6
HYDROMAROC "TRF" Member Join Date: Aug 2007 Location: SAN DIEGO, CA USA Watch: me pass... Posts: 1,111	I see you live in the UK. What I use is, time.gov Obviously the "hour" will be off but the minute and seconds would be the same for you. I hope I explained that right...?? The site is ran by the U.S. navy and is accurate to 0.2 of a second.

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